Your logo is boring, and so is the nav menu. The background for the header, as well as body is lacking in imagination. Same with the sidebar.

It just seems like something put together in 1 – 2 days, rushing for a deadline. A theme is more like a painting, than a meme or a doodle. Look at some of the newly approved themes, and then look at yours. Would you pay for your theme?

Your theme looks very undercooked. There is a difference between minimal design, and absence of design. The former is when you spend one week putting in stuff, and two weeks removing it. The latter is when you don’t do squat.